Without ignition, your Kia vehicle won't start. That ignition only comes about thanks to your factory spark plugs and the initial flash that they deliver.

When you turn the ignition key or press the start button, the spark plugs fire an electric arc across a gap between two leads. The gaps are calibrated to deliver the exact level of sparking needed to combust the mix of oxygen and fuel inside your engine. Once that happens, pistons pump, your engine roars to life, and you're set to head off.

How to Spot Faulty Spark Plugs

Over time, though, your spark plugs may lose their effectiveness. That may be from excessive corrosion, or perhaps the gaps between the leads have grown too wide to produce an effective spark. When that happens, you'll notice your engine doesn't respond quite right. Signs of this include:

Engine misfires

Your engine idles roughly

Fuel economy worsens

You have problems starting your Kia vehicle

Lastly, your "Check Engine" dashboard light may come on. That, however, is an extremely generic alert. You'll need to connect a code reader to determine the true cause of the warning.

Check your owner's manual to see when you need to replace your spark plugs if you're not experiencing any of these symptoms. If you want to keep your engine running right, you don't want to drive them past their rated mileage.

Save on The Genuine Kia Spark Plugs That Are Your Best Option

When you do need to replace your old spark plugs, the ones made by your vehicle's manufacturer are always the best option. That's because they're designed for your model and its engine, so you can trust in their performance. Find yours right here in our online auto parts catalog, in stock and offered at prices up to 35% lower than the MSRP!